Portable sanding, abrading, and polishing machine



NI. N. PIIANGE. Y

PORTABLE SANDING] ABRADING, AND POLISHING MACHINE.

APPLICATION FILED JULY 20,1920.

1 ,42 1 ,308 Patented June 27, 1922.

2 SHEETSAIIEET I.

TLIIIIIU.

II "I" I l M. N. PRANGE.

PORTABLE SANDINLI, ABRADING, AND POLISHING MACHINE. APPLICATION PILEDJULY 20,1920. 1,421,303, Patentedlune 27, 1922.

2 SHEETS-SHEET 2.

.awww/n. Il 6 f msm m DN m M L m ..6 v. M. I f i IIIIIIIIIII I W/TNESSESMAURICE NORVAL IPR-ANGE,

0F DETROIT, MICHIGAN.

PORTABLE SN'DING, ABRADING, AND POLI'SHING MACHINE.

Application filed July 20,

To all whom t may concern.'

Be it known that I, ll/JIAURIOE N. PRANGE, a citizen of the UnitedStates, and a resident of Detroit, in the county of lVayne and State ofMichigan, have invented a new and Improved Portable Sanding, Abrading,and

olishing Machine, of which the following is a full, clear, and exactdescription.

The present invention relates to new and useful improvements insurfacing machines, and it pertains more particularly to devices of thischaracter especially adapted for surfacing floors, also forautomobilebodies and furniture.

It is the primary object of the present invention-to provide aplurality7 of surfacing elements, the operating face of which may beprovided with any suitable element, such, for example, as sandpaper,brushes, or-the like.

It is a further object of the present invention to provide a means forsimultaneously reciprocating said surfacing elements.

It is a further object of the invention to provide a device of thischaracter which is capable of movement over the surface operated upon.

It is a further object of the invention to provide a single power unitforoperating said surfacing elements.

It is a still' further object of the invention to mount .the surfacingelements in such a manner as to reduce the friction of their reciprocalmovement.

With the above and other objects in view, reference is had to theaccompanying drawings, in whichh Figure 1 is a top plan view of a deviceconstructedy in accordance with the present invention; i

Fig. 2 Vis a sectional view thereof taken on the line 2 2 of Fig.1;

line 3*3 of Fig. 1;

Fig. 4 is a detail sectional view showing the manner of supporting thesurfacing elements for reciprocal ovement and taken on the line 4-4 ofFig. 2;

Fig. 5 is a detail top plan view of one of the surfacing elements;

Fig. 6 is a side elevation thereof.

eferring more particularly to the drawings, the device comprises a frame10 of rectangular form. This frame 10 is provided with a. pair of spacedbraces 11 in the form of upstanding webs which extend Specification ofLetters Patent.

Ving secured in is adapted tofmesh the transversely extending shaft 21in order .to rotate said shaft.

Fig. 3 is a sectional view taken on the Patented June 257, 19522. 1920.vSerial No. 397,731.

transversely of the frame as shown in Fig. 1. The frame 10 is supportedupon rollers or caster wheels 12, which form the means for rendering themachine portable over the surface operated upon.`

Suitably mounted on the frame isa motor 13, preferably of the electrictype, and the armature shaft of said motor has one of its ends projectedbeyond the casing and carries a bevel gear 14. Mounted on `the frame andsecured a plurality of bearings 16, said bearings beplace by means ofscrew bolts or the like 17. VAs shown inFig. 1, the platform 15 issecured within the lframe 10 by means of clips or brackets 18, and bolts19, the clips or brackets 18-being carried by the platform 15 andresting on the upper edge of the frame as indicated at 20 in saidfigure.

Extending transversely, of the machine and mounted in the bearings 16,is a shaft 2l, and said shaft 21 is provided with la plurality of bevelgears 22, as best seen in Fig.

1. The reference character'23 plate secured to the platform 15 a bolt24, and said plate 23 has a vertically projecting arm 25. This arm 25 isprovided with two right-angular extensions 26 and 27, which lie in ahorizontal plane vand mounted for rotation in said right-angulardesignates a by means of .extensions 26 and 27 is a vertical shaft 28.VSecured tothe vertical shaft 28 in such a manner as to rotate therewithis a bevelgear 29, and said bevel gear 29 is adapted to mesh with thebevel gear 14 heretofore mentioned on the armature shaft of the motor13. Secured tothe lower end of the vertical shaft 28 is a bevel gear 30,and said bevel gear 30 with the bevel gear on ounted in the transversebraces 11, are shafts 31, said shafts being mounted at each end inroller bearings 32 carried by saidto the platform 15 thereof, is

saidchannels to rotate its respective shaft 31, thus driving itsrespective cam member 34. By this mechanism it will be apparent that asthe motor is operated through the medium of the bevel gear 14 meshingwith the bevel gear 29, to drive the vertical shaft 28, the bevel gear30 will be rotated, and through the `medium of the gear with which itmeshes, will drive the shaft 21. Upon rotation of the shaft 2,1, each ofthe bevel gears 22 acts to drive its Vrespective gear 36, therebyproviding for a rotary movement of the several cams 34.

The platform 15 is cut out or channeled as indicated at 40, and lyingwithin each of 40 are the opposed half sections 41 of a ball race, eachof said half sections 41 being secured to the under side of the platform15 by means of bolts, rivets orthe like 42. The'reference character 43designates the several `polishing elements, andsccured to opposite sidesof each of the polishing elements are halves 44 of ball races, whichhalves are adapted to lie opposite the halves 41 to form completeraceways for the reception of the` antifriction balls 45. By thismechanism, it will be seen that the several polishing elements aresuspended beneath the platform 15.

As best shown. in Figs. 5 ande, each of the polishing elements 43 is cutout as indicated by the reference character 50, and closing said cut-outportion is an angle iron "51, one `end of which is right-angularlydisposed with respect to the body portion as in dicated at 52. Thisangle iron is secured inplace by means of bolts or screws 53 over thecut-out portion of each of the polishincr elements. As shown in Fig. 2,a plura ity of wedges 54 are `adapted to pass through the space 'in thecut-out portion() between `the angle iron 5 1 and the polishing element43, to secure the abrading material `55 in place, said abrading materialb'eing shown in the `present instanceas sand paper.

1n order to prevent displacement of the several wedges 54, longitudinalkeys 56 are passed through cutout portions 57 in said wedges. t. y

`Each of the polishing` elements 43 `is adapted to be secured to areciprocating` member 60, said polishing elementslbeing fastened to thereciprocating` element 60 by means of a bolt 61, which passes through anopeninfr 62 in the right-angular extension 5 2 of t e plate or angleiron 51. Mounted centrally of the ends of the reciprocating "memberO, isa bolt 62K', and said bolt 62 `forms the means for securing a rotatablefianges,

dog 63 to the reciprocatingl member, said dog 63 lying within thechannel 35 of its respective cam member 34, it being understood thatthere is one reciprocating mehr ber 60 for each of the cam membersv34.These dogs 63 each comprises a dislr 64, which disk is rotatably mountedon antifriction balls or rollers 65.

From the above description it will be apparent that as each ofthe` cams34 is rotated as heretofore described, the channel 35 thereof will serveto reciprocate its respective dog 63, and Vwill thereby operate itsrespective member 60. As the member 60 is reciprocated, it will be seenthat the abrading surface carried thereby will be reciprocated rapidlyover the surface treated, therebyV smoothing said surface. It willfurther be apparent that owing to the supporting wheels or casters 12,the device is readily movable over the surface to betreated in orderthat the entire surface may be covered by the machine.

y What is claimed is:

1. A device of the character described comprising a frame, a platformimmovably carried by said frame, said platform having its under surfaceprovided with a plurality of channels, guides mounted in each of saidchannels, an abrading element mounted in rled ,by each of said abradingelements and projecting through an opening in the plat-` form, aplurality of cam wheels adapted" for engagement with each of theverticallyextending membersy whereby the abrading elements arereciprocated upon rotation of the cam wheels, and means for driving saidcam wheels in unison, as and for the purpose set forth. f Y

2., 'A device of the character described comprising a frame, a platformcarried thereby, reciprocatively mounted in said platform, a pluralityof parallel flanges, projecting from the upper face of said platform, aplurality of camwheels mounted between said a shaft for each of saidcamwheels, a gear carried Vshaft extending 'parallelA to said flangesand provided with a` plurality of gears adapted for single engagementwith the gears of the cam wheels, and means for driving said a.plurality of abrading elements by .each of said. shafts, a

lastmentioned shaft to rotate the cam wheels and impartreciprocating"movement to the abradmg elements. y

" MAURICE noaviin Paaren.

